Perspective: Depth in an image. This is usually depicted in 2D artwork.
Principles of Design: The ways that artists use the elements of art in a work of art.
Elements of Art: The visual components of color, form, line, shape, space, texture, and value.
Color: Is the element of art that involves light.
3d Art: Art that exists in the 3d realm
2d Art: Art that is typically flat.
Abstract: Art that does not attempt to represent external reality, but seeks to show the artist's interpretation of something.
Non Objective: Art that uses only the elements and principles of art to make artwork.
Representational: Art that represents what is seen.
Conceptual: Art that is based only on ideas.
Videos on the Elements and Principles of Design